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Preparation and application of a flotation inhibitor for the separation of copper-molybdenum sulfide ore

A copper molybdenum sulfide and inhibitor technology, which is applied in flotation, solid separation and other directions, can solve the problems of increased production cost, high synthesis cost, insoluble products in water, etc., and achieves low production cost, good effect, and copper suppression effect. obvious effect

Active Publication Date: 2019-09-13
云南伦扬科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it was discovered in subsequent applications that although the inhibitor has a good effect of inhibiting copper and molybdenum floating, there are also products that are difficult to dissolve in water or even weak acids. In the preparation process, the unreacted thioglycolic acid and chitosan are filtered and washed, and then dried, which increases the production cost

Method used

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  • Preparation and application of a flotation inhibitor for the separation of copper-molybdenum sulfide ore
  • Preparation and application of a flotation inhibitor for the separation of copper-molybdenum sulfide ore
  • Preparation and application of a flotation inhibitor for the separation of copper-molybdenum sulfide ore

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preparation example Construction

[0021] The preparation and application of the flotation inhibitor for the separation of copper-molybdenum sulfide ore of the present invention is characterized in that the preparation steps of the flotation inhibitor for the separation of copper-molybdenum concentrate are as follows: a certain amount of chitosan is weighed and added to a certain amount of thioglycolic acid , stirred and dissolved, then added to a certain amount of concentrated sulfuric acid, stirred and reacted for a certain period of time at room temperature, and the inhibitor product was obtained.

[0022] The degree of deacetylation of the chitosan is greater than or equal to 70%.

[0023] The mass ratio of the chitosan to the thiol reagent in the method of the invention is 1:10-20.

[0024] The concentrated sulfuric acid in the method of the present invention is 0.5-1.0% of the total mass.

[0025] The stirring time in the method of the present invention is 5-12 hours.

[0026] The flotation inhibitor de...

Embodiment 1

[0031] (1) Preparation of mercapto-chitosan: Weigh 10 g of chitosan with a degree of deacetylation of 70%, add it to 100 g of thioglycolic acid and 1 g of concentrated sulfuric acid, and stir at room temperature for 12 hours to obtain a mercapto-chitosan mixture.

[0032] (2) The copper-molybdenum separation flotation inhibitor prepared by the present invention is subjected to a single mineral flotation experiment to verify its effect of suppressing copper and floating molybdenum. Add 200g of molybdenite and 200g of chalcopyrite to 3000mL of distilled water, adjust the pH to 9.5 with lime slurry, add the mercapto-chitosan mixture prepared in step (1) with different concentrations in turn, stir for 5min, add 70mg of kerosene, and stir for 5min , add 20mg of terpineol oil, stir for 5 minutes; scrape and foam for 5 minutes, the foam and tailings products are collected, dried and weighed to calculate the recovery rate. See Table 1 and Table 2 for the comparative results of sodium ...

Embodiment 2

[0047] (1) Preparation of mercapto-chitosan: 5 g of chitosan with a degree of deacetylation of 80% was weighed, added to 100 g of thioglycolic acid and 0.5 g of concentrated sulfuric acid, and stirred at room temperature for 5 hours to obtain a mercapto-chitosan mixture.

[0048] (2) The copper-molybdenum separation flotation inhibitor prepared by the present invention is subjected to a single mineral flotation experiment to verify its effect of suppressing copper and floating molybdenum. 200g molybdenite and 200g chalcopyrite were added to 3000mL distilled water respectively, the pH was adjusted to 10.5 with lime slurry, the mercaptochitosan prepared in step (1) of different concentrations were added successively, stirred for 5min, 70mg of kerosene was added, stirred for 5min, Add 20 mg of terpineol oil, stir for 5 minutes; scrape and soak for 5 minutes, and the foam and tailings products are collected, dried and weighed to calculate the recovery rate. See Table 5 and Table 6...

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Abstract

The invention relates to beneficiation separation, in particular to preparing and application for a copper and molybdenum sulphide bulk concentrate separating flotation inhibitor. Preparing is characterized in that according to the floatation inhibitor, mercaptoacetic acid with a good inhibiting effect and chitosan are subjected to an esterification reaction, and a thiolated chitosan mixture is prepared. The inhibitor is composed of the mercaptoacetic acid with the good inhibiting effect, chitosan macromolecules with active hydroxyl and amino, and thiolated chitosan generated through the esterification reaction and is used for floatation of copper and molybdenum sulphide bulk concentrate separating, and a good copper inhibiting and molybdenum floating effect is achieved. The preparing method is simple, conditions are moderate, the cost of raw materials is low, the requirement of industrial production is met, and meanwhile the defects that the use amount of common sodium sulphide is large, the operation environment is severe, pollution is serious, and the beneficiation cost is high are overcome.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to the preparation and application of a copper sulfide molybdenum ore separation flotation inhibitor. Background technique [0002] The commonly used inhibitor in the flotation separation of copper-molybdenum mixed concentrate is sodium cyanide, but the main problems of sodium cyanide are high toxicity, difficult degradation of cyanide-containing wastewater, great harm to human body and environment, and large dosage. The cost of copper-molybdenum separation is high. Therefore, it is of great practical significance to choose efficient, non-toxic or low-toxic inhibitors instead of sodium cyanide. [0003] Thioglycolic acid has shown its superiority in the separation of copper and molybdenum due to its high selectivity, low pollution, low dosage and good inhibition effect. Thioglycolic acid can be floated in a wide range of pH values, with short action time and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/016C08B37/08B03D103/02B03D101/06
Inventor 龚瑜焦扬杨亚玲
Owner 云南伦扬科技有限公司
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